php html qr variablen ausgabe

<?php
echo '<img src="php/qr_img.php?d=Ich%20bin%20ein%20Text>"';

echo "\r\n<ul>\r\n\t<li>\r\n\t\t<a href='web-manual.de'>web-manual.de</a>\r\n\t</li>\r\n</ul>";


$qr_Name = "P07062 üüüü \n";
$qr_Inventory ="200700610 \n";
$qr_Serial = "648061 \n";
$qr_Mac = "001D60C26E09 \n";

$complStr = $qr_Name.$qr_Inventory . $qr_Serial . $qr_Mac;

echo '<pre>';
echo '<img src="php/qr_img.php?d=',$complStr,'"';

echo $complStr;
echo '</pre>';
?>